Scraper for ditching machines



July 26, 1932 H. H. BARBER I SCRAPER FOR DITCHING MACHINES Filed Dec. 9,1929 5 Sheets-Sheet 1 m/"42 2i 77a? fl Earlier:

July. 26, 1932. H BARBER 1,868,515

SCRAPER FOR DITCHING MACHINES Filed Dec. 9, 1929 5 Sheets-Sheet 2 veer?arr-a: fidrg f7. Barfien July 26, 1932. H. H. BARBER SCRAPER FORDITCHING MACHINES Filed Dad. 9, 1929 5 Sheets-Sheet 3 4 4:25. 1Q 7747fBarert V y 1932- H. H. BARBER 1,868,515

SCRAPER FOR DITCHING MACHINES Filed Dec 9, 1929 5 Sheets-Sheeft 4 IYYQ/EPF j/arg fl Barer'.

July 26, 1932. H. H. BARBER 1,853,515

SCRAPER FOR DITCHING MACHINES Filed Dec. 9, 1929 I 5 Sheets-Sheet 5Patented July 26, 1932 UNEEE STATES PATENT OFFICE HARRY H. BARBER, OFAURORA, ILLINOIS, ASSIGIIOR TO BARBER COMPANY, F AURORA, ILLINOIS,.ACOR-FORA'IION OF ILLINOIS SCRAPER FOB, DITCI'IING IYIACHINES Applicationfiled December 9, 1929. Serial No. 412,679.

This invention relates to a scraper for ditching machines, and concernsitself with a yielding mounting therefor, whereby the scraper becomesreleased when encountering an unusual obstruction.

" The invention comprises the novel structure and combination of partshereinafter described and more particular y pointed out anddefined inthe appended claims.

. In the accompanying drawin which illustrate a preferred form ofthisinvention and in which similar reference nun erals refer tosiinilarfeatures in the different views:

' Figure 1 is an elevational view of the scraper and its supportingframe.

; Figure 2 is a front elevational view of the scraper in detached form.I

Figure 3 is an enlarged part elevational and part sectional View of thesupporting 520 means for the scraper. YT

F igure 4 1s a View similar to Figure 5.

I illustrating the scraper in its released position.

Figure 5 is a fragmentary elevational view zA ofa modified form ofrelease mechanism for supporting the scraper.

Figure 6 is a sectional view taken upon the line VIVI of Figure 5.

Figure 7 is a sectional view taken upon the line VTI-VII of FlgureFigure 8 is a fragmentary side elevatlonal View of a modified form ofthe invention. T -Figure 9 is a fragmentary front elevational view ofthe scraper.

Figure 10 is a fragmentary top plan view of a part of Figure 11.

Figure 11 is an enlargedpart sectional and part elevational view,showing the release mechanism of the form shown in Figure 8.

Figure 12 is a view similar to Figure 11, showing the parts in releasedposition.

' V In connection with this invention only certain partsof the ditchingmachine have been illustrated that cooperate with the scraper.

These parts consist of a frame 1 comprising a pair of horizontal anglebars and a pair of vertical angle bars, only one of each set of anglebars being shown. A pair of depending strips 2'extend from thehorizontal angle -eoibars to which they are pivoted and these strips 2are pivoted at their lower endsto the two parallel supporting bars 3of'the scraper. I

The scraper is also pivotallyconnected by a pair of vertical links 4with the upright frame members 1, whereby the scraper is pivotallysupported or-susp'ended from the frame. The upper end of the scraperframe carries a roller 5 which may be secured to the frame in anyconvenient manner. This invention concerns itself more directly withreleasable mechanism for retaining the upper end of the scraper throughthe instrumentality of the roller 5 as will presently appear.

According to this invention, a pair of parallel gusset plates 6 areattached to the frame 1. It will be noted that the gusset plates 6 arerespectively attached to the horizontal and vertical angle membersrespectively and projecttherebeyond. A pair of spaced swingable plates 7are pivoted to the gusset plates 6 by means of a pivot pin 8 which islocked against removal by means of adetent 9, as shown in Figure 3.Reinforcing plates 10 are welded to the sides of the swingable plates 7for reinforcingthe same. Each plate 7 has a recess terminating in anarcuate portion 11. The roller 5 which is carried by the upper end ofthe-scraper is adapted to freely enter this recess and normally contactthe arcuate portion 11, as shown in Figure 8. A yielding latch member 12is provided for yieldingly securingthe roller 5 in said recess and incontact with said arcua-te portion 11. The lever 12 is pivotedintermediate its ends upon a pivot pin 13 which extends betweenthe twoswingable plates 7. This lever 12 is provided with an offset portion letadjacent one end for engaging the roller 5 and securing the same 'in'said recess. The lever 1 1 projects beyond the olfset portion to providea handle 15 whereby it may be manually adjusted in the event the scraperhas been released. 7

The rear end of the lever 12 carries an adjustable screw 16 which isadapted for contacting a stationary fulcrum. block 17 upon the gussetplates 6. An abutment 18 is secured to the swingable plates 7 forsupconnects the two 'swingable plates 7 This anchor rod 22 passesthrough, an abutment 24 on the gusset plates and a coil spring surroundsthe rod 22 and abuts the abutment 24 atone end thereof. The other end ofthe coil spring 25 is confined by a suitableabutment 26 secured upontheend of the bolt 22. The abutment 26 is preferably adjustable through theinstrumentality of suitable nuts 27 screwed upon the end of the anchorrod. i

. Withreference to Figure 3, it will be noted that the tendency of thecoilspring 25 is to retain theswingable plates 7 with the stop stud 20.engageable in the recess 21. Likewise, the coil spring 19 normallymaintains the locking latch member 12 in the position shown in Figure 3in which thefroller 5; is yieldingly retained within the recesses oftheswingable plates 7. Should the scrap er encounter an abnormalobstruction that tends to elevate the same, the swingable plates 7 willbe partially rotated upon their pivot pin 8, as shown'in Figure 4. Asthe swingable plates 7 are caused to rotate in such man'- ner, the pivotpin 13 of the locking latch lever 12 will be carried therewith, but, asthe outer endof said'locking latchlever is held from downward movementby the abutment 1 7,.the pivot, 13 must move downwardly, with; theresult that there will bea separatior 1-;.of;v the latch lever and thearcuate portion 11 ofthemovableplates 7 as shown in Figure 4, wherebytheroller 5 may escape from said recess. -This will prevent any damage or,injury to the parts if the scraper should encounter'abnormal resistance.a f In Figures 5 and 6, a slight modification of the invention hasbeenshown, and, in referring to these figures, it will be noted that alljthe,difierentpar'ts are exactly the same as are shown in Figures 1 and2 and3 and 4, with the, exception that the anchor rod 22 and the'spring 25are arranged in a vertical position instead of in a horizontal position.

Duev to the vertical arrangement of the anchor rod 22, the gusset platesthat support the swingable .platesare'slig'htly different in form, but,as they constitute no part ofthis invention except as to form supportsfor the movable plates 7, they might be of any contour. 7 1 u I i aInFigures8 to 11, affurther modification of the invention has beenillustrated as our bodying the preferred form. In this form, a pair ofsupports or gusset plates 29' are secured to the frame 1 in spacedrelation, as shown in Figure 9. These supports have a re-entrant portion29a for receiving a roller 30 which is journalled or secured upon a boltor the like 31 secured to the bars 32 of the scraper. The re-entrantportion 29a is adapted to be closed by a retaining lever 33 which issubstantially in the form of a bell-crank lever with its lower armcurved upwardly as indicated at 33a and pivoted between the two supportsat its apex, as indicated at 34.

The'retaining lever 33 is adapted to belatched behind the roller 30 toreleasably retain the scraper in operative position. i To this end, alatch lever 35 is pivoted intermediate its ends upon a pivot 36extending.

through said supports 29. This latch lever has a cut-out portion 35awhich forms a shoulder 35b for engaging the retaining lever 33, as shownin Figure 10. Upon each side of the latch lever 35 there is a lever 37..The

levers 37 are pivoted at their rear ends upon a bolt 38 extendingbetween but not through the plates 29, and they are-also pivoted'at anintermediate point upon the pivot 36. It willbe noted that the rear endof the latch lever 35 is free and that aspring 39 secured upon the topof the supports bears thereon forward of thepivot 36. Y v

The lower edges of the levers 37 normally rest upon the roller 30 andthey are yieldingly pressed against said roller by a coil spring 40which is anchored by means ofa rod 41 extending therethrough and havinga nut 42 engaging the top thereof. The lower end of the rod 41 isswiveled upon the bolt 38 and the spring 40 bears against a plate 43secured to the upper edges of the plates 29. i

The scra er 1s su orted for swin in D movements at its upper end throughthe 37 and compress the spring 40. At about the same time the latchlever 35 would be elevated for releasing the retaining lever 33 whichwould be swung downwardly, as shown in dotted lines in Figure 2, due tothe outward force exertedthereon by the scraper, which would becomereleased. In connection therewith, it will be noted that the spring 40yieldingly supports the scraper at its work.

After the scraper has been released, it may be replaced in the yieldinglatching mechanism. As it swings over into operative position, theroller 30 will engage the curved end of the retaining lever and swingthe same back into its full line position.

I am aware that numerous details of construction may be varied through awide range without departing from the principles of this invention, andI, therefore, do not purpose limiting the patent granted otherwise thannecessitated by the prior art.

I claim as my invention:

1. In a ditching machine embodying a scraper, a support having are-entrant portion, a scraper having a roller for entering saidre-entrant portion, a retaining lever pivoted to said support andswingable for engaging said roller, a latch lever for latching saidretaining lever, and yielding means acting in a downward direction onsaid scraper.

2. In a ditching machine, a scraper, means for supporting said scraperfor upward movement, yielding means tending to resist such upwardmovement, and latching means for normally retaining said scraper at itswork and adapted to be released upon an upward movement of said scraper.

3. In a ditching machine, a scraper, yielding means acting in a downwarddirection upon said scraper, and coacting latching members forsupporting the upper part of said scraper adapted to be released upon anupward movement of said scraper.

4. In a ditching m'achine embodying a scraper, means for releasablysupporting the upper end of said scraper comprising a support, a pair ofcoacting members on said support for receiving a part of said scrapertherebetween, and a yielding lever acting upon said scraper in adownward direction.

5. In a ditching machine, a scraper, means for releasably supporting theupper end of said scraper comprising a pair of coacting latching membersadapted to be released upon an upward movement of said scraper, andyielding means tending to resist such upward movement of said scraper.

6. In a ditching machine embodying a frame, a plate upon said frame, ascraper having an upwardly extending portion, a holding lever pivoted tosaid plate, said upwardly extending portion having means engaged by saidlever for normally maintaining said scraper at its work, a latch leverengaging said holding lever, and yielding means for normally maintainingsaid latch lever in cooperative relation with said holding lever, butadapted to yield upon upward movement of said scraper to release saidholding lever.

7. In a ditching machine embodying a frame, a plate member upon saidframe, said plate member having a re-entrant portion, a bell crank leverpivoted to said plate and having one arm extending into said re-entrantportion, a spring pressed latch lever pivoted to said plate and having ashoulder for en gaging said arm, and a scraper having means confined bysaid bell crank lever and adapted for elevating said latch lever uponupward movement of said scraper.

8. In a ditching machine embodying a frame, a pair of relatively movablecoacting members upon said frame, a scraper having an upwardly extendingmember provided with transversely extending means normally confinedbetween said co-acting members, yielding means for normally maintainingsaid members in engagement with said means, said members being adaptedto be forced apart to release said transverse means upon upward movementof said scraper.

9. In a ditching machine embodying a frame, a plate having a re-entrantportion, a scraper having an upwardly extending portion provided withmeans normally located in said re-entrant portion, lever mechanism forengaging said means and normally maintaining the same in said re-entrantportion, and yielding means for controlling said lever mechanism adaptedto yield upon upward movement of said scraper for releasing said meansIn testimony whereof I have hereunto subscribed my name at Aurora, KaneCounty,

Illinois.

HARRY H. BARBER.

